default location for juliapkg.json

> [project is location:] If you are in a Python virtual environment or Conda environment, then {env}/julia_env subdirectory is used.
> [juliapkg.json location] {project}/pyjuliapkg where project is as above (depending on your environment).

These seems non-ideal.
Since normally one would git-ignore this directory.
Since it can be recreated by venv or conda. (or pixi in my case, but that looks like conda for this purpose).

This location makes sense to be where you install things to.
But not for where the file that specifies what you want to install lives.

I would think that it would want to live in same directory as `pixi.toml`/`pyproject.toml`/`requirements.txt`/`environment.yml`